This is a difficult question for artists in dealing with the behavior of returning bottles (usually empty, or if in the UK, more urine will be promoted), shoes, food, mud, etc. stage (in English collectively known as bottling) of the audience. This has become a typical "specialty" of some famous music festivals such as Reading, Download (formerly Donnington Catsle). It is used as an effective "weapon" for the crowd to demoralize and drive out bands they don't like, as happened with tatkuink com 50 Cent and G-Unit at the Reading festival. 2004 when they couldn't even sing a line (for some reason the organizers invited 50 Cent to perform with a lineup of rock/indie artists, which is typical of Reading).
It is also sometimes
abused by powerful figures to settle personal grudges such as the fact that Sharon Osbourne's mother and daughter gave Iron Maiden a whole basket of eggs at Ozzfest 2006 just because singer Bruce Dickinson "accidentally" criticized Ozzy. Osbourne is the "commercialization of music". But many times, it is completely due to the unconsciousness of some extremists, unconsciously, often drunk, causing injury or even endangering the artist's life. Silverchair's Daniel Johns required multiple stitches after tunning a glass bottle in the head during a performance in Santa Monica in 1995 or more recently, Panic singer Brandon Urie! At the Disco was knocked unconscious within minutes while performing at Reading (2006) or guitarist Nick Hipa of the rising metalcore group As I Lay Dying was also beaten so badly that he had to be taken to the emergency room in a serious condition. bloody state (Sydney, February 2008).

It was a situation no one wanted to be in
but it was also a time when the band showed either their bravery or their professionalism. Usually, the band's response is to pause the performance and go back inside the stage until the hot heads skull apparel below have "cooled down" and the security forces "turned in", kicking the ass. extremist elements out. Some names with "criminal records" such as Axl Rose (Guns n' Roses), Sebastian Bach (ex-Skid Row), Marilyn Manson or Nikki Sixx and Tommy Lee of Motley Crue ... choose to use violence to respond. .
While Axl Rose was famous for his "martial arts"
threatening to cut the show if the audience did not stop bombarding the band, in 1989, Sebastian Bach had to go to court for jumping in and kicking the audience. below after being hit in the head with a bottle, seriously injuring a 17-year-old female spectator. Bach later had to pay $10,000 to be released on bail. Nikki Sixx and Tommy Lee not only attacked the audience, but also attacked the security staff for "abusing power, intentionally doing wrong". Tommy Lee also had to eat jail time to pay the price for the above action.